Four Incredible Machines That Are No Longer With Us

Explore four groundbreaking machines lost to history in this deep dive! From the mighty SR.N4 hovercraft to the Soviet supersonic TU-144, discover what made them iconic—and why they disappeared. Warographics: https://www.youtube.com/channel/UC9h8BDcXwkhZtnqoQJ7PggA MegaProjects: https://www.youtube.com/channel/UC0woBco6Dgcxt0h8SwyyOmw Into The Shadows: https://www.youtube.com/c/IntotheShadows Today I Found Out: https://www.youtube.com/user/TodayIFoundOut Highlight History: https://www.youtube.com/channel/UCnb-VTwBHEV3gtiB9di9DZQ Brain Blaze: https://www.youtube.com/channel/UCYY5GWf7MHFJ6DZeHreoXgw Casual Criminalist: https://www.youtube.com/c/TheCasualCriminalist Decoding the Unknown: https://www.youtube.com/channel/UCZdWrz8pF6B5Y_c6Zi6pmdQ Places: https://youtube.com/@Places302?si=u5C3dXhcJ4tFuY-4 Astrographics: https://youtube.com/@Astrographics-ve4yq?si=4J_1EcNWIjXSBFOl